Unlike existing Adobe apps like Photoshop Express and Photoshop Touch, all four are currently for iOS only. Sorry, Android and Windows Phone users: you’re out of luck this time.

Photoshop Mix
First up is Photoshop Mix, a new iOS edition of Photoshop intended for collaging parts of different images – very basic compositing, effectively – with a UI optimised for your finger, not a mouse or graphics tablet.

It’s aimed at home users, but it can export PSD files, and it supports features from the desktop version of Photoshop not present in the existing free Photoshop Express, like Shake Reduction and Content-Aware Fill.

That’s assuming you have a Creative Cloud subscription: Photoshop Mix does all of the heavy lifting for processor-intensive operations in the cloud, leaving non-subscribers with the basic feature set.

You’ll need iOS 7.0 or above, and probably a recent iPad – by all accounts, its a pretty demanding app.

Sketch and Line, Adobe’s new ‘social drawing’ and drafting apps, in use with the company’s Ink & Slide hardware: a $200 pressure-sensitive digital pen and ruler set designed for use with a tablet.

Sketch and Line
Next up are Sketch and Line, a pair of related drawing apps. Sketch is described as a “social drawing” tool, which basically means it lets your share your work in progress on Behance, and get feedback inside the app.

It has a range of basic natural media tools – a graphite pencil, an ink pen, two blending markers (brush and chisel tip), and an eraser – and options for tracing or collaging reference images.

Line is similar, but designed for drafting, not freehand sketching. Tools include two pencils (2H, HB), two ink pens, (.25mm, .5mm), the two markers, and an eraser, all of which are customisable.

It also offers rulers and snapping to guides; Bezier curves; shape templates; and a workflow for setting up quick two-point perspective.

Again, the UI is optimised for standard touch controls, with gesture support for undo/redo, pan, zoom, scrubbing through the history or changing brush settings; and the app is compatible with Adobe’s new hardware.

You’ll need to be running iOS 7.0 or higher to use either, but Line is more picky about models of iPad.